RXTE Cycle 4 release

[Alan Smale <alan@osiris.gsfc.nasa.gov>]

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         Rossi X-ray Timing Explorer Guest Observer Program
            Cycle 4 Released: Proposals Due July 15, 1998
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   The NASA Office of Space Science (OSS) is releasing an Announcement
(AN 98-OSS-01) that solicits observing proposals for participation in
the NASA program to acquire and analyze scientific data from RXTE.

   This Announcement is the fourth for RXTE Guest Observations, and
solicits proposals for observations to be carried out beginning on or
around 1 January 1999. Cycle 4 is expected to last approximately 14
months. Proposals for observing time are due

                     ** 15th JULY, 1998 **

   The text of the Announcement, plus the relevant Appendices, may be
obtained from either the NASA OSS WWW site at:

	http://www.hq.nasa.gov/office/oss
(select the "Research Opportunities" menu)

or the RXTE Guest Observer Facility pages at:

	http://rxte.gsfc.nasa.gov/
(select "Proposals and Planning Tools" -> "NASA Research Announcements")

   Printed copies of the appendices can be requested by sending
papermail to
		Dr. Alan Smale
		RXTE Guest Observer Facility
		Code 660.2
		NASA Goddard Space Flight Center
		Greenbelt, MD 20771, USA

or by sending Email to xtehelp@athena.gsfc.nasa.gov. They may also be
downloaded from legacy.gsfc.nasa.gov in PostScript format.

   No funding will be provided through this Announcement, which is for
RXTE observing time only. From Cycle 4 onward, funding for analysis and
interpretation of new as well as archival RXTE data will be through
the NASA Astrophysics Data Program (ADP). Observers with accepted RXTE
Cycle 4 observations may submit a proposal for funding to the ADP
competition.

   Also new for Cycle 4 proposals: Proposers who have previously been
awarded RXTE observing time are required to append a page to their
proposal listing by Cycle, title, and proposal number their previously
accepted RXTE proposals and the status of the data analysis or
publications that have followed from them.

   Potential proposers are reminded that RXTE has a wide variety of
possible observing modes each with its own telemetry cost, and that
observing configurations must be specified on the proposal forms --
they cannot be supplied later or chosen for you by the RXTE SOC.  We
therefore strongly advise proposers to allow sufficient time to
familiarize themselves with RXTE and to perform the necessary
feasibility calculations and configuration selections.

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